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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5203) TT's version build is too restrictive
Date Thu, 19 Feb 2009 00:09:02 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12674828#action_12674828

Doug Cutting commented on HADOOP-5203:

> I do still believe that this including the date will cause this problem (which now has
a supported work-around) to occur for other people using other build systems.

And Owen feels strongly that the current behavior protects us against real hazards.  He's
had clusters that only partially upgraded and encountered unexpected difficult to diagnose
problems.  We need to reach a consensus.  So the question is not whether this is the way you
would implement this in a vacuum, but whether this is a solution that we can all agree to.
 Do you have an alternate proposal that you prefer that Owen might support?  If not, can you
live with the solution I suggested?

> TT's version build is too restrictive
> -------------------------------------
>                 Key: HADOOP-5203
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5203
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.19.0
>            Reporter: Runping Qi
>         Attachments: HADOOP-5203.patch
> At start time, TT checks whether its version is compatible with JT.
> The condition is too restrictive. 
> It will shut down itself if one of the following conditions fail:
> * the version numbers must match
> * the revision numbers must match
> * the user ids who build the jar must match
> * the build times must match
> I think it should check the major part of the version numbers only (thus any version
like 0.19.xxxx should be compatible).

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